![background image](http://html.mh-extra.com/html/omega/tx12/tx12_user-manual_3050192006.webp)
5.0 USER CONFIGURATION
IMPORTANT
READ COMPLETE SECTION BEFORE ATTEMPTING CONFIGURATION
PARTICULAR CARE SHOULD BE TAKEN REGARDING TIMEOUTS IN MENU 2 & 3
Figure 3 Configuration circuit
User Configuration
User configuration uses three menus, each menu sets a different parameter:-
Menu 1
Set range
Menu 2
Set direction of output on sensor burnout
Menu 3
User trim at 4 mA and 20 mA.
The configuration menus are navigated using the push button and program LED, The
push button is located under the hole in the keyhole shaped wiring label. To press the
button use a 3 mm screw driver (flat blade) inserted into the hole. The button has a slight
click action.
Three types of button press are used:-
•
Single button press
= Advance
•
Double press within 0.5 seconds
= Escape or change direction
•
Press and hold button > two seconds
= Enter
When a menu is selected the Program LED will flash in bursts of one to three flashes, the
number of flashes represents the menu number.
Navigating the menus
•
To access menus, press and hold button > 2 second, then program LED will start
to flash, one flash every burst. This Indicates “menu 1” is selected.
•
Use single button press to advance selection to “menu 2”, the program LED will
now show two flashes per burst. The Next single presses will advance the
selected menu to menu 3 and the next single press will advance selected menu
back to menu 1. Repeated single presses will cycle the selected menu back
around menus 1 to 3, in the above sequence.
•
Double press button to escape from menus, and return to normal. Normal
operation can also be selected by turning transmitter power off and on. Note the
transmitter will not time out and automatically escape from menus.
Using Menus
Menu 1 Range configuration (No Timeout)
Configuration will require the following tools and equipment :-
•
DC Supply (12 to 30) V @ 30 mA
•
Precision resistance decade box to simulate PT100 sensor.
•
Screw driver flat blade 3mm wide
•
PT100 resistance tables
•
Current meter (user trim)
To re-range the temperature scale follow the following instructions:-
•
Refer to figure 3, connect resistance box to TX12 input terminals using three wire
connection. Connect output to a DC supply, observe polarity. Turn power on and
allow 1 minute warm up period.
•
Set calibrator to the equivalent resistance of the PT100 sensor, at required low
range temperature. If the program LED is on at this stage the input is out of range,
check resistance and connection.
•
Press and hold button > 2 seconds to enter menus, menu 1 will then be selected,
indicated by one flash every burst.
•
Whilst menu 1 is selected, press and hold button > 2 seconds to enter menu 1, at
which stage the program LED toggle on and off at a slow rate.
•
Allow ten seconds then single press button to store low range setting, the program
LED will now flash at a fast rate.
•
Set calibrator to the equivalent resistance of the pt100 sensor, at required high
range temperature and allow ten seconds.
•
Press button to store high range setting, the program LED will flicker for one
second before the transmitter returns to normal operation. The transmitter is now
re-ranged.
Menu 2 Burnout Selection (Timeout is 3 Seconds)
•
Refer to figure 3, Connect output to a DC supply, observe polarity. For this menu
the input can be connected or open circuit. Turn power on.
•
Press and hold button > 2 seconds to enter menus, menu 1 will then be selected,
indicated by one flash every burst.
•
Single press button to advance selection to menu 2, indicated by two flashes of
the program LED every burst.
•
Whilst menu 2 is selected, press and hold button > 2 seconds to enter menu 2, at
which stage the program LED will either toggle on and off at a slow indicating low
scale burnout or fast rate indicating upscale burnout.
•
To change burnout direction single press button. The Program LED toggle rate will
change to the other setting. Repeated single presses will toggle between up and
down scale.
•
To store setting allow 3 seconds with no button action, the program will then
timeout, store new setting then return to normal operation.
Menu 3 User trim (Timeout is 20 Seconds)
This menu allows the user to trim the output current at 4 mA and 20 mA points,
(similar function to trim potentiometers) and is very useful for trimming out sensor
errors.
The input of the transmitter must be connected to either a calibrator or
temperature sensor held at a known temperature. The (4 to 20) mA loop current
also need to be monitored with a current meter.
•
Refer to figure 3, connect sensor or resistance box to TX12 input terminals using
three wire connection. Connect output to a DC supply, observe polarity, connect
current meter in series with loop. Turn power on and allow 1 minute warm period.
•
Set calibrator to the equivalent resistance of the PT100 sensor, at required
point. Alternatively ensure sensor temperature is at the required calibration point.
•
The transmitter will automatically trim the 4 mA end if the output is within the active
band of (3.8 to 6) mA, and trim the 20 mA end if the output is within the active
band of (18 to 21.5) mA. No setting adjustment is performed if the output current
not within these two bands. Ensure your calibration points are within these bands.
•
Press and hold button > 2 seconds to enter menus, menu 1 will then be selected,
indicated by one flash every burst.
•
Single press button to advance selection to menu 2, and single press again
select menu 3 indicated by three flashes of the program LED every burst.
•
Whilst menu 3 is selected, press and hold button > 2 seconds to enter menu 3,
which stage the program LED toggle on and off at either a slow rate indicating
downward trim direction or fast rate indicating upwards trim direction.
•
To change trim direction double press button. The Program LED toggle rate
toggle to the opposite direction. Repeated double presses will toggle between
and down trim direction
•
To trim output current, single press button to advance current 2 uA in set direction,
or press and hold button to auto advance in set direction release button to stop
advance. Note after approximately 20 seconds of continuous button press,
auto trim rate will speed up. Monitor the current change on the current meter.
•
To store new setting allow 20 seconds with no button action, the program will then
timeout, store new setting then return to normal operation.
Reset to factory default settings
If required the SEM203P can be reset to factory default setting, this procedure also
removes any user trim adjustment. Factory default settings are :
Range
(0 to 100) °C
Burnout
up-scale
User trim
All user adjustment cleared
To reset to factory setting, hold the button down whilst the TX12 is powered up.
Where Do I Find Everything I Need for
Process Measurement and Control?
OMEGA…Of Course!
Shop online at omega.com
M4498/0607
TEMPERATURE
䡺
⻬
Thermocouple, RTD & Thermistor
Probes, Connectors, Panels & Assemblies
䡺
⻬
Wire: Thermocouple, RTD &
Thermistor
䡺
⻬
Calibrators & Ice Point References
䡺
⻬
Recorders, Controllers & Process
Monitors
䡺
⻬
Infrared Pyrometers
PRESSURE, STRAIN AND FORCE
䡺
⻬
Transducers & Strain Gages
䡺
⻬
Load Cells & Pressure Gages
䡺
⻬
Displacement Transducers
䡺
⻬
Instrumentation & Accessories
FLOW/LEVEL
䡺
⻬
Rotameters, Gas Mass Flowmeters &
Flow Computers
䡺
⻬
Air Velocity Indicators
䡺
⻬
Turbine/Paddlewheel Systems
䡺
⻬
Totalizers & Batch Controllers
pH/CONDUCTIVITY
䡺
⻬
pH Electrodes, Testers & Accessories
䡺
⻬
Benchtop/Laboratory Meters
䡺
⻬
Controllers, Calibrators, Simulators &
Pumps
䡺
⻬
Industrial pH & Conductivity Equipment
DATA ACQUISITION
䡺
⻬
Data Acquisition & Engineering
Software
䡺
⻬
Communications-Based Acquisition
Systems
䡺
⻬
Plug-in Cards for Apple, IBM &
Compatibles
䡺
⻬
Datalogging Systems
䡺
⻬
Recorders, Printers & Plotters
HEATERS
䡺
⻬
Heating Cable
䡺
⻬
Cartridge & Strip Heaters
䡺
⻬
Immersion & Band Heaters
䡺
⻬
Flexible Heaters
䡺
⻬
Laboratory Heaters
ENVIRONMENTAL
MONITORING AND CONTROL
䡺
⻬
Metering & Control Instrumentation
䡺
⻬
Refractometers
䡺
⻬
Pumps & Tubing
䡺
⻬
Air, Soil & Water Monitors
䡺
⻬
Industrial Water & Wastewater
Treatment
䡺
⻬
pH, Conductivity & Dissolved
Oxygen Instruments
RETURN REQUESTS/INQUIRIES
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department.
BEFORE RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN
AUTHORIZED RETURN (AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT
(IN ORDER TO AVOID PROCESSING DELAYS). The assigned AR number should then be
marked on the outside of the return package and on any correspondence.
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to
prevent breakage in transit.
FOR
WARRANTY
RETURNS, please have
the following information available BEFORE
contacting OMEGA:
1. Purchase Order number under which
the product was PURCHASED,
2. Model and serial number of the product
under warranty, and
3. Repair instructions and/or specific
problems relative to the product.
FOR
NON-WARRANTY
REPAIRS, consult
OMEGA for current repair charges. Have the
following information available BEFORE
contacting OMEGA:
1. Purchase Order number to cover the
COST of the repair,
2. Model and serial number of the
product, and
3. Repair instructions and/or specific problems
relative to the product.
WARRANTY/DISCLAIMER
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and
workmanship for a period of
13 months
from date of purchase. OMEGA’s WARRANTY adds
an additional one (1) month grace period to the normal
one (1) year product warranty
to
cover handling and shipping time. This ensures that OMEGA’s customers receive maximum
coverage on each product.
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer
Service Department will issue an Authorized Return (AR) number immediately upon phone
or written request. Upon examination by OMEGA, if the unit is found to be defective, it will
be repaired or replaced at no charge. OMEGA’s WARRANTY does not apply to defects
resulting from any action of the purchaser, including but not limited to mishandling,
improper interfacing, operation outside of design limits, improper repair, or unauthorized
modification. This WARRANTY is VOID if the unit shows evidence of having been tampered
with or shows evidence of having been damaged as a result of excessive corrosion; or
current, heat, moisture or vibration; improper specification; misapplication; misuse or other
operating conditions outside of OMEGA’s control. Components in which wear is not
warranted, include but are not limited to contact points, fuses, and triacs.
OMEGA is pleased to offer suggestions on the use of its various products.
However, OMEGA neither assumes responsibility for any omissions or errors nor
assumes liability for any damages that result from the use of its products in
accordance with information provided by OMEGA, either verbal or written.
OMEGA warrants only that the parts manufactured by the company will be as
specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESSED OR IMPLIED,
EXCEPT THAT OF TITLE, AND ALL IMPLIED WARRANTIES INCLUDING ANY
WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE HEREBY DISCLAIMED. LIMITATION OF LIABILITY: The remedies of purchaser
set forth herein are exclusive, and the total liability of OMEGA with respect to this
order, whether based on contract, warranty, negligence, indemnification, strict
liability or otherwise, shall not exceed the purchase price of the component upon
which liability is based. In no event shall OMEGA be liable for consequential,
incidental or special damages.
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1)
as a “Basic Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or
activity; or (2) in medical applications or used on humans. Should any Product(s) be used in
or with any nuclear installation or activity, medical application, used on humans, or misused
in any way, OMEGA assumes no responsibility as set forth in our basic WARRANTY /
DISCLAIMER language, and, additionally, purchaser will indemnify OMEGA and hold
OMEGA harmless from any liability or damage whatsoever arising out of the use of the
Product(s) in such a manner.
It is the policy of OMEGA Engineering, Inc. to comply with all worldwide safety and EMC/EMI
regulations that apply. OMEGA is constantly pursuing certification of its products to the
European New Approach Directives. OMEGA will add the CE mark to every appropriate device
upon certification.
The information contained in this document is believed to be correct, but OMEGA accepts no
liability for any errors it contains, and reserves the right to alter specifications without notice.
WARNING:
These products are not designed for use in, and should not be used for, human
applications.
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is
possible. This affords our customers the latest in technology and engineering.
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.
© Copyright 2007 OMEGA ENGINEERING, INC. All rights reserved. This document may not be
copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine-
readable form, in whole or in part, without the prior written consent of OMEGA ENGINEERING, INC.